LeafChat is a free IRC client for Microsoft Windows and Unix-like operating systems, licensed under the GNU GPL-3.0-or-later.

[3] Users can add their own scripts and command shortcuts, and the software detects net splits.

[4] Beginning in 2004, IRCReviews gave the software five stars (of five), as an Editors's Choice, describing it as "powerful, good looking, and scriptable.

"[2][5] In a 2010 review of version 2, LeafChat was described as "very well done", with a "killer" scripting API which was "convenient and easy", though the reviewer found some user-interface defaults "annoying", and ruled out using LeafChat due to perceived variable count limitations.

[6] The Simple Genetic Algorithm project at SourceForge suggested LeafChat (due to its zero cost) for its online IRC live developer support, and thoroughly outlined its setup.